Podcast
Questions and Answers
What is distance measured in?
What is distance measured in?
- only meters and centimeters
- units like miles, kilometers, meters, centimeters, inches, and yards (correct)
- only inches and yards
- only miles and kilometers
Why do miles make sense on larger scales?
Why do miles make sense on larger scales?
- because they are smaller than centimeters
- because they are larger than centimeters (correct)
- because they are only used for distance
- because they are always used for speed
What is the relationship between distance and change in position?
What is the relationship between distance and change in position?
- distance is never equal to change in position
- distance is only used for change in position
- distance is always equal to change in position
- distance and change in position are related but not always the same (correct)
What does speed measure?
What does speed measure?
What can you do with distance?
What can you do with distance?
What does a speed of 50 miles per hour mean?
What does a speed of 50 miles per hour mean?
Why is it more useful to calculate average speed when your speed is changing constantly?
Why is it more useful to calculate average speed when your speed is changing constantly?
What is the unit of time usually used to measure speed?
What is the unit of time usually used to measure speed?
A car travels 75 miles in 3 hours. What is the average speed of the car?
A car travels 75 miles in 3 hours. What is the average speed of the car?
A girl travels 10 miles in 2 hours and then travels 5 miles in 1 hour. What is her average speed?
A girl travels 10 miles in 2 hours and then travels 5 miles in 1 hour. What is her average speed?
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Study Notes
What is Distance?
- Distance is the amount of space between two things or people, or the amount something has moved, measured as a continuous line.
- Units of measurement for distance include miles, kilometers, meters, centimeters, inches, and yards.
- The choice of unit depends on the context, with miles suitable for larger scales and centimeters for smaller scales.
Distance vs. Change in Position
- Distance traveled is related to a change in position, but they are not the same thing.
- Change in position is the difference in where you are at two different times, while distance is the amount of space you've moved, regardless of direction.
Calculating Average Speed
- Speed is the rate at which distance changes, measured in meters per second or miles per hour.
- Average speed is calculated using the equation: average speed = total distance / total time.
- The equation can be used to find average speed in various situations, such as calculating the average speed of a car or a bicycle.
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